Genitourinary function and defecation after colorectal cancer surgery with low- and high-ligation of the inferior mesenteric artery: A meta-analysis

Table 2 Quality assessment of included non-randomized trials based on Newcastle-Ottawa scoring system

Ref.	Year	Selection of the research object	Comparability	Measurement	NOS score
AlSuhaimi et al[15]	2019	3	1	3	7
Chen et al[4]	2020	3	2	2	7
Dimitriou et al[18]	2018	2	1	3	6
Kverneng Hultberg et al[20]	2017	3	1	2	6
Lee et al[17]	2018	2	2	2	6
Park et al[14]	2020	3	1	3	7
Yasuda et al[21]	2016	2	2	3	7
You et al[13]	2020	3	2	3	8
You et al[19]	2017	2	1	3	6

NOS: Newcastle-Ottawa scale.